What is the use of tag <tbody>

Answer 1

It's meant to use in conjunction with <thead> and <tfoot>.
<thead> is the head of the table <tbody> is the body and <tfoot> is is the foot of the table. It does not effect the style of the table by default, but it can be modified with CSS and it nicely organizes or separates your table parts.

I made a little example here: https://code.sololearn.com/WGqxaDpWDt4p

Answer 2

thanks jeromy